Chicago, United States Ulaanbaatar, Mongolia

Chicago is in the CDT timezone (UTC-5) and Ulaanbaatar is in the +08 timezone (UTC+8). The time difference between them is 13 hours.

Use the timeline above to find overlapping business hours between Chicago and Ulaanbaatar. The "Best time to meet" card highlights the window where both cities are within working hours (9 AM – 6 PM local time).

Chicago observes Daylight Saving Time, while Ulaanbaatar does not. When DST is active in Chicago, the time difference changes by 1 hour.

Click the pencil icon next to the Chicago clock and type any time. The Ulaanbaatar clock will update instantly, showing the exact corresponding time. You can also pick a date to account for DST changes.